Sliding track assembly

Abstract

Sliding track assembly is provided. A sliding track assembly includes a first rail, a second rail reciprocally moved with respect to the first rail, a third rail reciprocally moved with respect to the second rail, and a latch mechanism disposed on the second rail. The first rail has a retaining block, and the third rail has a protrusion. The latch mechanism includes a pair of swing arms engaged against the retaining block. When the latch mechanism is forced by the protrusion, the pair of swing arms is swung outwardly and disengaged from the retaining block.

1. A sliding track assembly, comprising:
 a first rail; 
 a retaining block disposed on the first rail; 
 a second rail reciprocally moved with respect to the first rail; 
 a third rail reciprocally moved with respect to the second rail; 
 a latch mechanism disposed on the second rail, wherein the latch mechanism includes a pair of swing arms engaged against the retaining block when the second rail is in a first position; and 
 a protrusion disposed on the third rail, wherein when the third rail is moved relative to the second rail and the protrusion forcibly engages the latch mechanism, the pair of swing arms is swung outwardly and disengaged from the retaining block. 
 
   
   
     2. The sliding track assembly as claimed in  claim 1 , wherein the second rail includes a hole with the pair of swing arms penetrating therethrough. 
   
   
     3. The sliding track assembly as claimed in  claim 1 , wherein the pair of swing arms is L-shaped. 
   
   
     4. The sliding track assembly as claimed in  claim 1 , wherein the pair of swing arms pivotally is connected to the second rail. 
   
   
     5. The sliding track assembly as claimed in  claim 1 , wherein the latch mechanism further includes an elastic means connecting the pair of swing arms, wherein the elastic means forces the pair of swing arms to engage against the retaining block. 
   
   
     6. The sliding track assembly as claimed in  claim 5 , wherein the elastic means comprises a spring, a clip or combination thereof. 
   
   
     7. The sliding track assembly as claimed in  claim 1 , wherein the latch mechanism is a U-shaped elastic strip. 
   
   
     8. The sliding track assembly as claimed in  claim 1 , the latch mechanism further including a flexible contact portion connecting the pair of swing arms, wherein the protrusion forces the flexible contact portion to swing the pair of swing arms. 
   
   
     9. The sliding track assembly as claimed in  claim 8 , wherein the flexible contact portion is curved. 
   
   
     10. The sliding track assembly as claimed in  claim 8 , wherein the flexible contact portion and the pair of swing arms are integrally formed in one piece. 
   
   
     11. The sliding track assembly as claimed in  claim 1 , the latch mechanism further including a pair of funnel-shaped contact portions formed in the pair of swing arms, wherein the protrusion forces the pair of funnel-shaped contact portions to swing the pair of swing arms. 
   
   
     12. The sliding track assembly as claimed in  claim 11 , wherein the pair of funnel-shaped contact portions and the pair of swing arms are integrally formed in one piece. 
   
   
     13. The sliding track assembly as claimed in  claim 1 , further comprising a sliding bearing slidably disposed between the first and second rails. 
   
   
     14. The sliding track assembly as claimed in  claim 1 , further comprising a sliding bearing slidably disposed between the second and third rails. 
   
   
     15. A sliding track assembly, comprising:
 a first rail including a block; 
 a second rail moved with respect to the first rail, wherein the second rail includes a latch mechanism having a pair of arms engaged against the block when the second rail is in a first position; and 
 a third rail moved with respect to the second rail, wherein the third rail includes a protrusion at an end thereof, and when the third rail is moved with respect to the second rail the protrusion forcibly engages the latch mechanism to expand a gap between the pair of arms, the pair of arms is disengaged from the block, and the second rail is moved from the first position to a second position with the block passing the gap. 
 
   
   
     16. The sliding track assembly as claimed in  claim 15 , wherein the second rail includes a hole with the pair of arms penetrating therethrough. 
   
   
     17. The sliding track assembly as claimed in  claim 16 , wherein the pair of arms is pivotally connected to the second rail. 
   
   
     18. The sliding track assembly as claimed in  claim 17 , wherein the latch mechanism further includes an elastic means connecting the pair of arms, wherein the elastic means forces the pair of arms to engage against the block. 
   
   
     19. The sliding track assembly as claimed in  claim 15 , the latch mechanism further including a flexible contact portion connecting the pair of arms, wherein the protrusion forces the flexible contact portion to swing the pair of arms. 
   
   
     20. The sliding track assembly as claimed in  claim 19 , wherein the flexible contact portion and the pair of arms are integrally formed in one piece. 
   
   
     21. The sliding track assembly as claimed in  claim 15 , the latch mechanism further including a pair of funnel-shaped contact portions formed in the pair of arms, wherein the protrusion forces the pair of funnel-shaped contact portions to swing the pair of arms. 
   
   
     22. The sliding track assembly as claimed in  claim 21 , wherein the pair of funnel-shaped contact portions and the pair of arms are integrally formed in one piece. 
   
   
     23. The sliding track assembly as claimed in  claim 15 , further comprising a sliding bearing slidably disposed between the first and second rails. 
   
   
     24. The sliding track assembly as claimed in  claim 15 , further comprising a sliding bearing slidably disposed between the second and third rails.